Ryan Gallagher is a journalist who reports on surveillance, security, and civil liberties.

On Thursday, the ACLU is set to argue in court that the DOJ should be forced to disclose the legal interpretations used by the government to conduct forms of clandestine location surveillance. The memos in question are particularly significant because they were authored following U.S. v. Jones, a landmark Supreme Court ruling in 2012 that forced the feds to seek a search warrant in most cases before attaching a GPS tracking device to a vehicle. However, the Jones ruling did not apply to cellphone tracking, which the DOJ still insists it can do without a warrant—even while some states have enacted laws banning all warrantless tracking, and federal courts have handed down conflictingopinions on the issue.

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The memos the ACLU is seeking would shed light on how the DOJ is advising federal prosecutors and investigators to interpret the law. Earlier this year, the civil liberties group filed a request under the Freedom of Information Act to obtain the documents, the existence of which was first revealed by the FBI’s general counsel during a public speech at the University of San Francisco in 2012. But the DOJ’s response to the FOIA request was to send ACLU a version of the documents that were heavilyredacted—almost all of the 111 pages were blacked out completely on the grounds that they were “privileged and confidential” and “law enforcement sensitive.”

The DOJ claims that it cannot publicly release the documents because they are “attorney work product” and disclosure would hinder the executive branch’s ability to freely discuss legal theories. The ACLU counters that “once those opinions become official government policy the public has an absolute right to know what they are. Otherwise, the government is operating under secret law that makes accountability to the people impossible.”

The case, of course, comes at a crucial moment for the Obama administration. It has been forced to defend its surveillance policies in recent weeks following a series of leaked secret documents on domestic and international NSA spying. A particular focus of controversy during the backlash over the NSA leaks has been the administration’s heavy reliance on secret legal interpretations of the law to justify its actions, which is apparent not only in the realm of covert surveillance but also in the domain of drone strikes. Responding to criticism about excessive secrecy, President Obama has said that he is committed to greater transparency on national security and will work to release more classified documents. Making public the tracking memos would surely be as good place as any to make a start.

Update, Aug. 15: On Thursday, the judge in the case ordered the government to provide him with a copy of the full, unredacted tracking memos so that he can review them and decide next steps. The government had argued against this course of action, so the judge's decision marks a small victory for the ACLU. The Justice Department has until Monday to turn over the memos, according to the civil liberties group. I'll report further developments as and when they happen.